Submission #4578445
Source Code Expand
#include <string> #include <vector> #include <sstream> #include <iostream> #include <algorithm> #include <map> #include <list> #include <set> #include <numeric> #include <queue> #include <stack> #include <cstdio> #include <cmath> #include <cstdlib> #include <cctype> #include <cstring> #include <climits> #include <cfloat> #include <ctime> #include <complex> #include <cassert> #include <array> #include <bitset> #include <unordered_map> #include <random> using namespace std; typedef long long LL; typedef pair<int,int> P; const int L=1e5+1; vector<int> es[L]; char col[L+10]; map<int,int> mf[L],mg[L],mh[L]; int hitf[L]; int pref[L]; int f(int r,int p) { if(mf[r].count(p)) { return mf[r][p]; } if(r==0) { return mf[r][p]=0; } if(col[r]=='W') { return mf[r][p]=1; } if(hitf[r]==0) { pref[r]=p; for(auto i:es[r]) { if(i!=p&&f(i,r)) { hitf[r]=i; return mf[r][p]=1; } } hitf[r]=-1; } else if(hitf[r]==p) { for(auto i:es[r]) { if(i!=p&&f(i,r)) { return mf[r][p]=1; } } } else if(hitf[r]>0) { return mf[r][p]=1; } else { return mf[r][p]=f(pref[r],r); } return mf[r][p]=0; } int sumg[L]; int preg[L]; int cntg[L]; int g(int r, int p) { if(mg[r].count(p)) { return mg[r][p]; } if(f(r,p)==0) { return mg[r][p]=0; } int sum=0; int cnt=0; if(sumg[r]==-1) { preg[r]=p; for(auto i:es[r]) { if(i!=p) { if(f(i,r)) { sum+=g(i,r)+2; cnt++; } } } sumg[r]=sum; cntg[r]=cnt; } else { sum=sumg[r]; cnt=cntg[r]; if(f(p,r)) { sum-=g(p,r)+2; cnt--; } if(f(preg[r],r)) { sum+=g(preg[r],r)+2; cnt++; } } if(p==0) { cnt++; } if(col[r]=='B') { cnt++; } if(cnt%2) { sum++; } //cerr << "g " << r << ", " << p << ": " << sum << endl; return mg[r][p]=sum; } int sumh[L]; int preh[L]; int mxh[L]; int mx2h[L]; int cnth[L]; int h(int r,int p) { if(mh[r].count(p)) { return mh[r][p]; } if(f(r,p)==0) { //cerr << "aaa " << r << ", " << p << endl; return mh[r][p]=0; } int sum=0; int mx=0; int cnt=0; if(sumh[r]==-1){ preh[r]=p; int mx2=0; for(auto i:es[r]) { if(i!=p){ if(f(i,r)) { sum+=g(i,r)+2; int d=g(i,r)+2-(h(i,r)+1); if(mx<d) { mx2=mx; mx=d; } else if(mx2<d) { mx2=d; } cnt++; } } } sumh[r]=sum; cnth[r]=cnt; mxh[r]=mx; mx2h[r]=mx2; } else { sum=sumh[r]; cnt=cnth[r]; mx=mxh[r]; if(f(p,r)) { sum-=g(p,r)+2; int d=g(p,r)+2-(h(p,r)+1); if(mx==d) { mx=mx2h[r]; } cnt--; } if(f(preh[r],r)) { sum+=g(preh[r],r)+2; int d=g(preh[r],r)+2-(h(preh[r],r)+1); if(mx<d) { mx=d; } cnt++; } } if(cnt==0) { if(p==0) { sum=1; } return mh[r][p]=sum; } if(p==0) { cnt++; } if(col[r]=='W') { cnt++; } if(cnt%2) { sum++; } sum-=mx; int v=min(sum,g(r,p)); //cerr << "h " << r << ", " << p << ": " << v << endl; return mh[r][p]=v; } int main() { //memset(hitf,-1,sizeof(hitf)); memset(sumg,-1,sizeof(sumg)); memset(sumh,-1,sizeof(sumh)); int N; cin >> N; for(int i=1;i<N;i++){ int x,y; cin >> x >> y; es[x].push_back(y); es[y].push_back(x); } col[0]='B'; cin >> (col+1); bool any=false; for(int i=1;i<=N;i++) { if(col[i]=='W'){ any=true; break; } } if(!any) { cout << 0 << endl; return 0; } int ret=1<<20; for(int i=1;i<=N;i++) { ret=min(ret,h(i,0)); } cout << ret << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - Monochrome Cat |
User | kenimo |
Language | C++14 (Clang 3.8.0) |
Score | 800 |
Code Size | 3785 Byte |
Status | AC |
Exec Time | 733 ms |
Memory | 71936 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 800 / 800 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt |
All | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt, 1_018.txt, 1_019.txt, 1_020.txt, 1_021.txt, 1_022.txt, 1_023.txt, 1_024.txt, 1_025.txt, 1_026.txt, 1_027.txt, 1_028.txt, 1_029.txt, 1_030.txt, 1_031.txt, 1_032.txt, 1_033.txt, 1_034.txt, 1_035.txt, 1_036.txt, 1_037.txt, 1_038.txt, 1_039.txt, 1_040.txt, 1_041.txt, 1_042.txt, 1_043.txt, 1_044.txt, 1_045.txt, 1_046.txt, 1_047.txt, 1_048.txt, 1_049.txt, 1_050.txt, 1_051.txt, 1_052.txt, 1_053.txt, 1_054.txt, 1_055.txt, 1_056.txt, 1_057.txt, 1_058.txt, 1_059.txt, 1_060.txt, 1_061.txt, 1_062.txt, 1_063.txt, 1_064.txt, 1_065.txt, 1_066.txt, 1_067.txt, 1_068.txt, 1_069.txt, 1_070.txt, 1_071.txt, 1_072.txt, 1_073.txt, 1_074.txt, 1_075.txt, 1_076.txt, 1_077.txt, 1_078.txt, 1_079.txt, 1_080.txt, 1_081.txt, 1_082.txt, 1_083.txt, 1_084.txt, 1_085.txt, 1_086.txt, 1_087.txt, 1_088.txt, 1_089.txt, 1_090.txt, 1_091.txt, 1_092.txt, 1_093.txt, 1_094.txt, 1_095.txt, 1_096.txt, 1_097.txt, 1_098.txt, 1_099.txt, 1_100.txt, 1_101.txt, 1_102.txt, 1_103.txt, 1_104.txt, 1_105.txt, 1_106.txt, 1_107.txt, 1_108.txt, 1_109.txt, 1_110.txt, 1_111.txt, 1_112.txt, 1_113.txt, 1_114.txt, 1_115.txt, 1_116.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_000.txt | AC | 6 ms | 12544 KB |
0_001.txt | AC | 6 ms | 12544 KB |
0_002.txt | AC | 6 ms | 12544 KB |
0_003.txt | AC | 6 ms | 12544 KB |
1_003.txt | AC | 6 ms | 12544 KB |
1_004.txt | AC | 6 ms | 12544 KB |
1_005.txt | AC | 6 ms | 12544 KB |
1_006.txt | AC | 6 ms | 12544 KB |
1_007.txt | AC | 6 ms | 12544 KB |
1_008.txt | AC | 6 ms | 12544 KB |
1_009.txt | AC | 6 ms | 12544 KB |
1_010.txt | AC | 6 ms | 12544 KB |
1_011.txt | AC | 6 ms | 12544 KB |
1_012.txt | AC | 6 ms | 12544 KB |
1_013.txt | AC | 6 ms | 12544 KB |
1_014.txt | AC | 6 ms | 12544 KB |
1_015.txt | AC | 6 ms | 12544 KB |
1_016.txt | AC | 6 ms | 12544 KB |
1_017.txt | AC | 6 ms | 12544 KB |
1_018.txt | AC | 6 ms | 12544 KB |
1_019.txt | AC | 6 ms | 12544 KB |
1_020.txt | AC | 6 ms | 12544 KB |
1_021.txt | AC | 6 ms | 12544 KB |
1_022.txt | AC | 6 ms | 12544 KB |
1_023.txt | AC | 6 ms | 12544 KB |
1_024.txt | AC | 6 ms | 12544 KB |
1_025.txt | AC | 6 ms | 12544 KB |
1_026.txt | AC | 6 ms | 12544 KB |
1_027.txt | AC | 6 ms | 12544 KB |
1_028.txt | AC | 6 ms | 12544 KB |
1_029.txt | AC | 6 ms | 12544 KB |
1_030.txt | AC | 6 ms | 12544 KB |
1_031.txt | AC | 6 ms | 12544 KB |
1_032.txt | AC | 6 ms | 12544 KB |
1_033.txt | AC | 6 ms | 12544 KB |
1_034.txt | AC | 6 ms | 12544 KB |
1_035.txt | AC | 6 ms | 12544 KB |
1_036.txt | AC | 6 ms | 12544 KB |
1_037.txt | AC | 6 ms | 12544 KB |
1_038.txt | AC | 6 ms | 12544 KB |
1_039.txt | AC | 6 ms | 12544 KB |
1_040.txt | AC | 6 ms | 12544 KB |
1_041.txt | AC | 6 ms | 12544 KB |
1_042.txt | AC | 6 ms | 12544 KB |
1_043.txt | AC | 6 ms | 12544 KB |
1_044.txt | AC | 6 ms | 12544 KB |
1_045.txt | AC | 154 ms | 33280 KB |
1_046.txt | AC | 212 ms | 38528 KB |
1_047.txt | AC | 180 ms | 15616 KB |
1_048.txt | AC | 315 ms | 49024 KB |
1_049.txt | AC | 345 ms | 53120 KB |
1_050.txt | AC | 284 ms | 49280 KB |
1_051.txt | AC | 467 ms | 51576 KB |
1_052.txt | AC | 71 ms | 20736 KB |
1_053.txt | AC | 151 ms | 15480 KB |
1_054.txt | AC | 153 ms | 25340 KB |
1_055.txt | AC | 434 ms | 50936 KB |
1_056.txt | AC | 210 ms | 29692 KB |
1_057.txt | AC | 10 ms | 13312 KB |
1_058.txt | AC | 189 ms | 35968 KB |
1_059.txt | AC | 69 ms | 13568 KB |
1_060.txt | AC | 292 ms | 44288 KB |
1_061.txt | AC | 421 ms | 57088 KB |
1_062.txt | AC | 182 ms | 34944 KB |
1_063.txt | AC | 315 ms | 43392 KB |
1_064.txt | AC | 202 ms | 32256 KB |
1_065.txt | AC | 15 ms | 12672 KB |
1_066.txt | AC | 352 ms | 44028 KB |
1_067.txt | AC | 88 ms | 21760 KB |
1_068.txt | AC | 231 ms | 34304 KB |
1_069.txt | AC | 99 ms | 25600 KB |
1_070.txt | AC | 199 ms | 34816 KB |
1_071.txt | AC | 158 ms | 15232 KB |
1_072.txt | AC | 190 ms | 33024 KB |
1_073.txt | AC | 35 ms | 17152 KB |
1_074.txt | AC | 23 ms | 15104 KB |
1_075.txt | AC | 183 ms | 34304 KB |
1_076.txt | AC | 476 ms | 59008 KB |
1_077.txt | AC | 149 ms | 15104 KB |
1_078.txt | AC | 99 ms | 24192 KB |
1_079.txt | AC | 193 ms | 34048 KB |
1_080.txt | AC | 184 ms | 34048 KB |
1_081.txt | AC | 543 ms | 68736 KB |
1_082.txt | AC | 570 ms | 69120 KB |
1_083.txt | AC | 186 ms | 15616 KB |
1_084.txt | AC | 454 ms | 59648 KB |
1_085.txt | AC | 559 ms | 71552 KB |
1_086.txt | AC | 543 ms | 71936 KB |
1_087.txt | AC | 733 ms | 63992 KB |
1_088.txt | AC | 467 ms | 56952 KB |
1_089.txt | AC | 178 ms | 15992 KB |
1_090.txt | AC | 537 ms | 49912 KB |
1_091.txt | AC | 681 ms | 63992 KB |
1_092.txt | AC | 179 ms | 15992 KB |
1_093.txt | AC | 505 ms | 66432 KB |
1_094.txt | AC | 532 ms | 65536 KB |
1_095.txt | AC | 192 ms | 15616 KB |
1_096.txt | AC | 415 ms | 56576 KB |
1_097.txt | AC | 529 ms | 67200 KB |
1_098.txt | AC | 482 ms | 62848 KB |
1_099.txt | AC | 558 ms | 63868 KB |
1_100.txt | AC | 537 ms | 58876 KB |
1_101.txt | AC | 188 ms | 15868 KB |
1_102.txt | AC | 452 ms | 51580 KB |
1_103.txt | AC | 578 ms | 63868 KB |
1_104.txt | AC | 491 ms | 54908 KB |
1_105.txt | AC | 517 ms | 63744 KB |
1_106.txt | AC | 480 ms | 60416 KB |
1_107.txt | AC | 189 ms | 15744 KB |
1_108.txt | AC | 413 ms | 52480 KB |
1_109.txt | AC | 520 ms | 63744 KB |
1_110.txt | AC | 475 ms | 57600 KB |
1_111.txt | AC | 512 ms | 63744 KB |
1_112.txt | AC | 486 ms | 60416 KB |
1_113.txt | AC | 183 ms | 15744 KB |
1_114.txt | AC | 378 ms | 52480 KB |
1_115.txt | AC | 480 ms | 63744 KB |
1_116.txt | AC | 442 ms | 57600 KB |